I am currently using software based ACTI NVR http://www.acti.com/home/index.asp (11 IP Camera). I will be adding IP camera (up to 70 IP Camera) and hoping to use standalone NVR and remove the software based.

We are still looking for appliance to purchase as the model we are looking ACTI GNR 3000 (4HDD bay) dont have enough storage to support 70 IP camera - 30 days recording. I feel i am missing some part of the puzzle like adding a the storage solution that will work with CCTV appliance instead of looking for appliance that has enormous amount of storage to store 50 TB of video.

How did other CCTV systems deployed that they have enough storage and reliability of standalone NVR?